Rigler notch sign

The Rigler notch sign refers to an indentation in the border of a solid lung mass, which is thought to represents a feeding vessel, thus suggesting the presence of a bronchial carcinoma1. However, this sign is also observed in other conditions, including granulomatous infections, and its differentiating utility is therefore limited.

History and etymology

It is named after Leo George Rigler (1896-1979),American radiologist 2.